<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #p1{color: red}

        .c1{color: blue}

        h4,#p1,.c1{background-color: aqua}

        input[type='text']{background-color: red}

        *{
            border: 1px solid lawngreen;
        }
    </style>
</head>
<body>
    <input type="text">
    <input type="password">
    <h4>我是新来的！</h4>
    <p>香蕉</p>
    <p id="p1">苹果</p>
    <p class="c1">橘子</p>
    <h3>电视机</h3>
    <h3 class="c1">洗衣机</h3>
    <h3>电冰箱</h3>
</body>
</html>

